i dont like the gradients, also they eat up way to much colors... maybe u should put more details in this, its pretty much suited for copy/paste stuff... just make one detailed floor with minor shading and paste it all over the place...
like this... about 10-15 minutesof editing
http://i992.photobucket.com/albums/af45/oooonek/empirestatebuilding5finished.gif
your edit looks much smoother and it has a more 3d-ish appearance @onek
this is my first pixel so I love all the CC I can get :)